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  • Hyaluronidase , Corona penetrating enzymes , Zona lysin or Acrosin are:  Option: 1 Chemicals of secondary oocytes  

Hyaluronidase , Corona penetrating enzymes , Zona lysin or Acrosin are:
 

Option: 1

Chemicals of secondary oocytes
 


Option: 2

sperm lysins


Option: 3

acrosomal enzyme
 


Option: 4

 Chemicals of primary oocyte 
 


Answers (1)

As we have already discussed in Events of Fertilization -

Acrosomal Reaction:

  • The capacitated sperm undergo acrosomal reaction to release various chemicals present in the acrosome. Such chemicals are called sperm lysins.
  • Sperm lysins are:
    • Hyaluronidase: It acts on the ground substance of follicles.
    • Corona penetrating enzymes: These dissolve corona radiata.
    • Zona lysin or Acrosin: It digests the zona pellucida.
  • The plasma membrane of the sperm now fuses with the plasma membrane of the secondary oocyte.
  • This causes depolarization of the plasma membrane of the secondary oocyte.
  • It prevents polyspermy and ensures monospermy.

Hence, the correct option is (b).
 

Posted by

Ramraj Saini

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